Add 2023/Day 1/part2_first_attempt.js

2023/Day 1/part2_first_attempt.js

@@ -0,0 +1,55 @@
+#!/usr/bin/env node
+
+
+var inputstring = require('fs').readFileSync('input.txt','utf8');
+
+var regs = [/zero/g,/one/g,/two/g,/three/g,/four/g,/five/g,/six/g,/seven/g,/eight/g,/nine/g];
+
+var lines = inputstring.split('\n').filter(i=>i);
+var minNumerical = '0'.charCodeAt(0);
+var maxNumerical = '9'.charCodeAt(0);
+
+function convertline(line) {
+ for(var i in regs) {
+  line = line.replace(regs[i],`${i}`);
+ }
+ return line;
+}
+
+function greedyconvertline(line) {
+ if(line.length<3) return line;
+ for(var scopelength=3;scopelength<=line.length;++scopelength) {
+  var first = line.substr(0,scopelength);
+  var second = line.substr(scopelength);
+  var newline = convertline(first)+second;
+  var diff=0;
+  if(newline.length!=line.length) {
+   diff=(line.length-newline.length);
+  }
+  //console.log({line,scopelength,first,second,newline,diff})
+  scopelength-=diff;
+  line=newline;
+ }
+ return line;
+}
+lines = lines.map(greedyconvertline);
+//console.log({lines});
+
+function onlynumerical(str) {
+ return str.split('').map(i=>i.charCodeAt(0)).filter(i=>(i>=minNumerical && i<=maxNumerical)).map(i=>i-48);
+}
+function firstandlast(arr) {
+ return [arr[0],arr[arr.length-1]];
+}
+var nums = lines.map(i=>{
+ var nums = firstandlast(onlynumerical(i));
+ //console.log({nums});
+ return nums[0]*10+nums[1];
+});
+//console.log({nums});
+
+var sum=0;
+for(var i of nums) {
+ sum+=i;
+}
+console.log(sum);